peridium

Thân thiện

The peridium of the puffball has split open to release its spores.

Definition

Noun: - The outer layer or wall of the spore-bearing structure (sporocarp) in many fungi, particularly in slime molds and some puffballs. It encloses and protects the spore mass.

Usage

• The peridium is a key identifying feature for many fungal species, as its texture, thickness, and method of opening vary.
• In mycology, the peridium is examined to classify and differentiate between types of gasteroid fungi.

Examples

• The mature puffball's peridium ruptured at the apex to release a cloud of spores.
• Under the microscope, the structure of the peridium was clearly visible, consisting of several distinct layers.
• The peridium of this slime mold is calcareous, meaning it contains calcium deposits.

Advanced Usage

• Dehiscent peridium: A peridium that splits open in a defined manner (e.g., by pores, slits, or tearing) to disperse spores.
• Indehiscent peridium: A peridium that does not split open regularly; spores are released through breakdown or rupture.
• Peridial: The adjective form relating to the peridium (e.g., peridial layer, peridial characteristics).

Variants and Related Words

• Peridiole (noun): A small, contained packet of spores within a larger fruiting body, each often with its own miniature peridium, found in bird's nest fungi.
• Exoperidium (noun): The outer layer of a multi-layered peridium.
• Endoperidium (noun): The inner layer of a multi-layered peridium.

Synonyms

• Spore case
• Sporocarp wall
• Outer wall (in a mycological context)

Notes on Meaning

The term is highly specialized to mycology and botany. It refers specifically to the protective covering of a spore-producing organ and is not used in general contexts.

Học thuật

Noun

1. outer layer of the spore-bearing organ in many fungi